luiy of Bengal and the Arahiaa Sea. 1G7 



The figure of this species in tlie ' Thesaurus ' is very bad, 

 tlie eostie being represented too broad aud too few in 

 number. I luive a very strong impression that F. rvjinotlis, 

 JNlartens*, is only a variety of tiiis speeies. 



Fusns incertus, sp. n. 



Testa fusiformis, alba; anfractus 8?, superiores detriti, cajteri 

 convexi, costati, costis in aiifractu penidtimo circiter 13, liris 

 tibformibus confertis unduiue spiraHtor cincti Hueisque incre- 

 irienti slriati, ultimas infra medium contractus, costis antice 

 evanidis ; apertura inverse piriformis, cum canali longit. totius 

 ■^ ajquans ; columella tortuosa, callo loivi induta; canalis angus- 

 tus, obliquus, recurvus. 



Longit. 51 mm., diam. 22 ; apertura cum canali 25 longa, 9 lata. 



Hab. Station 317, off W. of Ceylon, 590 fath. 



A single specimen in dead condition. It somewhat recalls 

 the British Trltonofusus (Siphonorbis) fusiformis (Broderip), 

 except that the body-whorl is produced into a longer rostrum 

 anteriorly. 



The spiral thread-like lines are very fine and close-set, and 

 occasionally two or three form slightly raised ridges. Three 

 or four such ridges are noticeable on the upper whorls and 

 almost form nodules upon the costse. The lines of growth 

 are close together, and on crossing the transverse lirae give 

 them a minutely crispate appearance. 



Manaria, gen. nov. 



Testa fusiformis, longitudinaliter costata, periostraco induta ; colu- 

 mella in medio plica uuica iutrante instructa; labrumad marginem 

 tenue, intus iucrassatum et liratum. Operculum unguiforme, 

 corneum. 



This genus has the general aspect of a costate Tritonofusus, 

 but is distinguished by the fold on the columella and the 

 lirate aperture. 



Manaria Thurstoni, sp. n. 



Testa breviter fusiformis, alba, periostraco luteo induta, longitu- 

 dinaliter costata et spiralitcr striata ; anfractus 9 ?, superiores 

 abrupti, reliqui leviter convexi, sensim accrescentes, ultimus 

 costis 16-17 iufra medium evanidis instructus, antice breviter 

 rostratus ; apertura elongata, alba ; labrum ad marginem acutum, 



* Deutscb. Tiefsoe-Esped. ' Valdivia,' vol. vii. p. 103, pi. ii. fig. 10. 



